Scenario Based (1/5)
1. How do you structure Redux Toolkit in a large-scale React app (folder structure)?
    Organizing Redux Toolkit Structure in Large-Scale React Applications

    In large-scale React applications, a well-structured Redux Toolkit setup improves scalability, maintainability, and team collaboration. The goal is to separate concerns by feature or domain rather than by type (e.g., actions, reducers).

    Recommended Folder Structure (Feature-Based)
    • src/
    • ├── app/
    • │ ├── store.js → Configures the Redux store using `configureStore`
    • │ └── rootReducer.js → Combines feature slices (optional if small)
    • ├── features/
    • │ ├── users/
    • │ │ ├── usersSlice.js → Contains createSlice and reducers
    • │ │ ├── usersApi.js → Defines RTK Query endpoints (optional)
    • │ │ └── UsersList.jsx → Feature-specific UI components
    • │ ├── posts/
    • │ │ ├── postsSlice.js
    • │ │ ├── postsApi.js
    • │ │ └── PostItem.jsx
    • ├── components/ → Shared reusable UI components
    • ├── hooks/ → Custom React hooks (e.g., useAuth, useTheme)
    • ├── services/ → Common API logic or helper functions
    • ├── utils/ → Utility functions or constants
    • └── index.js / main.jsx → App entry point
    Example: store.js

    This modular structure allows each feature to encapsulate its state, API calls, and UI components, making it easier to scale the application as new features are added.